Combustion system



L. L. SCOTT. comsusnom SYST-EM.

APPLICATION FILED MAY 26. 1919.

Patented Dec. 2, 1919.

III!

LEW-IS L. scorn-0F s'r. ouis, mrssotmr.

' comnus'rron svsrma.

' Specification Letters Patent.

Patented Dec. 2. 1919.

Application filed. May 26, 1919. 1 Serial No. 299,715.

To all whom it may concern;

Be it known that 1, Lew s. L. Score, a

citizen of the United States, residing in the v cityof St. Louis and State of Missouri, have invented new and usefullmprovements in Combustion Systems, of which. the following is a specification.

-My invention relates to the burning of heavy oils which arepractically non-volatile at normal temperature, and has for its genand to the automatic stopping and startingof the same after the system has been placed in operation, and for automatically controlling the operation of the system according to combustion conditions.

The invention has for its further object to combine in such a system a vapor generator for volatilizing the oil to be burned and to provide for initially vaporizing and igniting the oil at the vapor burner by spraying said oil, igniting said spray, and directing the ignited spray over a burner located beneath a vaporizing coil supplying the oil thereto, whereby the oil will be first volatilized and then be ignited at the burner by said ignited spray, after which the latter is automatically out off, and combustion proceeds under the automatic action of the vapor burner.

In the accompanying drawing, the View is a diagrammatic representation of my improved combustion system, the vapor burner being shown substantially in plan view with reference to the parts with which it is con nected to more clearly illustrate the construction, and|the system as a whole being shown combined with a steam generating device. Referring now to the drawing, the numeral 1 indicates the coils of a semi-flash steam generator having a water inlet 2 and a steam outlet 3. The coils are inclosed in a heat insulating inclosure 4, in the bottom of which is located a hollow burner 5 provided with openings 6 in its top. Located over the burner is a fuel vaporizing coil 7 provided with a fuel-nozzle 8, which is directed into an air opening 9, entering the side'of the burner 5. The other end of the pipe constitutin the vaporizing coil 7 is connected to an communicates with a valve casing 10. A fuel pipe 11 leads from the fuel tank 12 to the valve casing 10. Within the valve casing 10 is ,a valve 10 for con-. trolling the supply of fuel to the vaporizing coil 7 The numeral 13 indicates an air compressor on the opposite sides of which are the usual check valves. 14 and 15, and which is connected to an air tank 16, which is adapted to be supplied with air to a pressure of, sa 100 lbs. The numeral 17 indicates a re ,ucing valve inja pipe 18 which lead fr m the air tank he t p ofh f el ank 2- Th va e 17 i a apt d du th P ure of the ai to, ay, 5 l a ing from the bottom of the fuel tank 12 is a second fuel pipe 19 in the length of which is inserted a float valve 20, from which leads a pipe having a fuel'noz zle 21. Leading from the air tank 16 is an air pipe 22 in the length of which is inserted a reducing valve 22 which is adapted to reduce the air pressure to, say, 2 lbs. Beyond the reducing valve 22,- the pipe 22 'is supplied with a valve 23 operated by a solenoid 23, and beyond this latter valve said pipeis provided with an air nozzle 24. The fuel nozzle 21 and air nozzle 24 are mounted in cooperative relation within an ignition chamber 25 provided with a spark plug26, the relation of the parts being such that when air passes under pressure from the nozzle 24 it will aspirate and atomize oil from the nozzle 21 and the atomized oil will be ignited by the a blower'28, with which blower is connected 'a pipe 29, which surrounds the ignition chamber 25 and enters the generator casing 4 above the burner 5. The numeral 30 indicates the primary winding of a spark coil,

36 indicates a Bourdon tube which is connected by means of a steam pipe 37 with the generator coils 1. The numeral 38 indicates an insulated screw-contact with which 00- operates a spring-held lever 39 which is connected'to and operated by the Bourdon tube 36. The positive wire 35 is electrically connected with the lever 39. A Wire 40 leads from the said screw 38 to one side of the motor 27. The numeral 41 indicates a solenoid spark plug 26. The numeral 27 indicates .an electric motor which operates the fan of of the core 42;

thereof, and at its other end being provided with a piston 43 working within a cylinder 44, which is provided in 1ts end with a small opening 45 to time the operation of thepiston 43. Surrounding the core 42, and lo-' cated between the solenoid 41 and a contact arm 47 carried by the core, is a coil spring 46. The contact arm 47 is adapted to be moved over 'an insulated electric contact plate 48 and to be moved off of said plate to break contact therewith by the movement on the'other end of the stem of the valve 10 is a head 49, adapted to be engaged by the inner end of the core 42, and located between said head and the valve casing 10 is a coil spring 50, which operates to' return the valve 10 .to its seat when the core 42 moves away from the head 49. Leading from the negative side of the battery 33 is a wire 51 which is connectedbya branch wire to the solenoid 41 and to the contact plate 48. The primary winding is'connected at one end to the wire 40 and at its other end, by a wire 52, to the arm 47 and contact plate 48. A branch wire 53lea'ds from wire 40 to the solenoid 41. A wire 54 leads from the wire' 52 to one end of the solenoid 23 and a wire '55 leads from the other end of said solenoid to the other side of the motor.

vThe air compressor 13 in practice would be operated from vthe motor 27, but to save illustration, I have indicated the same as being separately operated, as by a belt 56, which could be run from a separate motor.

The operation is as follows:

The air tank 16 having beensupplied with compressed air by operating the air compressor l3, and the switch 34 closed, the motor 27 will be placed in operation. The solenoid 23- will be energized to open the valve 23 to allow compressed air to escape from the nozzle 24 and aspirate oil from the nozzle 21, andthespark plug 26 will cause the ignition of the sprayed fuel. At the same time, the fan in the blower 28 will cause air to be blown through'the pipe 29 to mix with the ignited spray to cause complete combustion and thus heat the vaporizing coil 7. The solenoid 41 will also be energ'ized to move the core 42 to. unseat the valve 10 and allow. oil to pass through the pipe '11 and valve casing 10 to the vaporiz mg coil 7, in which it will be vaporized by the heat of the. ignited spray, and passing out through the nozzle 8, will be mixed'with air at the opening 9 and escaping upward through the openings 6 in the urner 5 will be ignited by the ignited spray of fuel projected from the pipe 29 over the burner 5. The movement of the core 42 also operates to 48 under the pressure of sprin move the contact arm 47 in contact with and over the plate 48 and eventually to move said arm off of said plate, in which position it is shown'in the drawing, whereby the circuit to the solenoid 23, motor 27 and spark coil 26 is broken, thesupply of sprayed fuel or less speed. This retarding of the movement of the contact arm 47 is to insure that the various operations above described leading to the .supply and ignition of the sprayed fuel and heating ofthe vaporizing, coil 7 shall have occurred before the valve 10 is opened to permit the flow of oil to said coil, and further to insure combustion occurring at the burner as a result of these operations before the spark-plug and motor are cutout bybreaking the contact between arm 47 and plate 48. After the device is placed in operation, as described, the oil in the coil 7 is vaporized by the heat of com bustion occurring at the burner 5 in the well known 1 manner. As combustion proceeds, steam is generated in the steam coils .1, and pressure created, which is reflected in the Bourdon tube 36. When a given pre-determined degree of pressure 1s reached, the Bourdon tube 36 will operate to move the lever 39 out of contact with the screw 38, 7

thereby breaking the circuit to the solenoid 41, and permitting the spring 46 to move the core 42 out of contact with the head 49 the battery, and the operation of the systemabove described be automatically repeated. When the arm 47 moves over the contact 46, which occurs when the circuit is bro en by the Bourdon tube, as just described, neither the motor 27, solenoid 23 or spark plug 26 will be operated, as the circuit including these devices will also be broken by the movement of the lever 39 effected by the Bourdon tube.

I claim:

1. In a combustion system in combination with a va or burner and means for supplying oil t ereto to be vaporized and burned, means for spraying and electricalligniting the spray. of a separate body of Oll and projecting the ignited .spray in proximity to said burner to produce vaporization and ignition of the oil supplied to the burner, and means for automatically cutting.

ing coil, means for supplying oil to said coil to be vaporized and burned, means for spraying and electrically ignitingthe spray of a'separate body of oil and projecting the ignited spray over said coil to...vaporize oil therein and ignites the resultant vapor,

and means for automatically cutting ofi the supply of sprayed fuel after combustion of the vaporized oil at the burner has oommenced. 4

3. In a combustion system in combination with a burner, a vaporizing coil located above and having a feed-nozzle for supply-.

ing vaporized oil to the burner, a source of oil for said coil, means for spraying and electrically igniting the spray of a separate body of the oil and pro ect1ng the ignited spray over said burner and about said coil to produce vaporization of the oil in said coil and ignition of the vapor thereof at the burner, and means for automatically cutting off the supply of sprayed fuel after combustion of the vaporized oil at the burner has started.

4. In a combustion system in combination with a vapor burner and means for supplying oil thereto to be vaporized and burned, means for spraying a separate body of said oil and projecting it in proximity to said.

burner, an electric device for igniting the sprayed fuel, whereby the latter will cause vaporlzation and ignition of the oil at the I burner, a blower for supplying air to the ignited spray to promote complete combustion, a motor for driving said blower, an

electriccircuit including said motor and ignition device, means for automatically breaking the circuit of said motor and ignition device at or combustion of the vaporized oil at the 1 urner has started, and auto- .matic means for stopping the supply of fuel to be sprayed when the said circuit is broken.

5. In a combustion system, in combination with a vapor burner and means for supplying oil thereto'to' be vaporized and burned,

I anelectrically operated valve controlling the oil at the burner,v an electrically-operated valve controlling the supply of oil to be sprayed, electric circuits including the elec trical operators of said valves and said ignition device, means for retarding the operation-of the valve controlling the supply of oilto't'he burner, means for electrlcally cutting out the electrical operator of the valve. controlling the supply of 011 to be sprayed,

a solenoid-operated va ve controlling the supply of fuel to the burner, 'means for spraying a separate body of the oil and projectin it in proximity to. said burner, an electric device forigniting the sprayed oil to produce vaporization andignition of the oil at the burner, a solenoid-operated valve controlling the supply of oil to be sprayed, electric circuits including the solenoid of said valves and said ignition device, means for retarding the operation by its solenoid of the valve controlling the supply of oil to the burner, and means for automatically cutting-out the solenoid of the valve controlling the supply of oil to be sprayed, and said ignition device, after cor-nbustion of the vaporized oil at the burner has started.

7 In a combustion system, in combination with a vapor burner and a pipe for supply ing oil thereto to be vaporized and burned, a'spring-pressed valve in said pipe normally closing the same against the feed offuel' to the burner, a solenoid for operating said said solenoid for automatically cutting out said ignition device and the solenoid of the valve controlling the supply of oil to be sprayed, after combustion of the vaporized. oil at the burner has started.

8. Ina combustion system, in combination with a vapor burner and a pipe for supplying oil thereto to be vaporized and burned,

a valve normally closing said pipe, asolenoid having a core adapted to operate said valve to open the same, means for spraying a separate bodyof the oil and projecting it in proximit to said burner, an electric device for igniting the sprayed oil to produoe vaporization and ignition of the oil at the burner, a solenoid-operated valve con? trolling the supply of oil to be sprayed, electric circuits including the solenoids of said valves, means for retarding the movement of the solenoid-core operating the valve controlling the supply of'oil to the burner, a contact in the circuit of the ignition device and of the' solenoid operating the valve controlling the supply of fuel to be sprayed, and a contact-member carried by the core of the first-named solenoidand adapted to be moved in engagement With and over said contact and then out of engagement therewith to break the circult to the ignition device and the second-nained solenoid and to permit the valveoperated by the latter to close, after combustion of the vaporizedoil at. the burner has started.

9. In a combustion system, in combination with a vapor burner and means for supplying oil thereto to be vaporized and burned,

a solenoid-operated valvel controlling. the" supply of fuel to the burner, means ,for spraying a separate body of the oil-and projecting it in proximityto said burner, an electric device for igniting the sprayed oil to produce vaporizationand ignition of the oil at the burner, a solenoid-operated Valve controlling the supply of oil to be sprayed,

electric circuits includin the solenoids o-f said valves and said ignltion device, means for automatically cutting out saidignition device and the solenoid of the valve controlling the supply of oil to be sprayed, after combustion "of the vaporized oil at the burner has started, a heat absorbing medium located above said burner, and meansfre to stop the action of said ign sprayed fuel after combustion of the vaporizedoil' at the burner-has started.

1 1. In a combustion system, in combination witha vapor burner and means for supplying oil thereto to be vaporized and burned, mechanism controlling the supply of fuel to the burner, means for spraying a separate'body' of oil and projecting it in proximit to said burner, an ignitlng device for igniting the 'sprayed oil to produce a vaporizing heat and source of ignition for the oil at the burner, mechanism controlling the supply of oil to vbe sprayed, means for retarding the feeding operation of the mechanism controlling the supply'of oil to the burner in relation.t0 the feeding operation of the mechanism controlling the supply of ecting oil to be sprayed, and means for e "automatic action of said latter mechanism to cut oil the supply of oil to be sprayed afterv combustion of thelvaporized oil at the burnerhas started.

12. In a combustion system, in combination with a vapor burner and means for supplying oil thereto to be vaporized and burned, mechanism controlling the supply of fuel to the burner, means for spraying a separate body of oil and projecting it in proximity to said burner, an igniting device for igniting the sprayed oil to produce a vaporizing heat and source of ignition for the oil at the burner, common controlling means for the supply of oil to be sprayed and said igniting device, means for retard- "ing the feeding operation of the mechanism controlling the supply of oil to the burner in relation to the production of said ignited spray, and means for effecting automatic action of saidcommon controlling means'to cut oil the supply of oil to bes'pr'ayed and ited means after combustion of the vaporized oil at the burner has started.

y In testimony whereof, I have hereunto set my hand.

ized and ignited at the burner, and means for automatically cutting of the supply of LEWIS L. SCOTT. 

